Aquamarine portfolio
Investment firm, Zurich · 13F holdings for the quarter ended June 30, 2026
Filed with the SEC July 10, 2026 · Next filing due by November 14, 2026
Reported value
$144.1M
up from $135.3M in Q1 2026
Positions
7
7 last quarter
Top 10 holdings
100.0%
of the portfolio
This quarter
0 new · 0 sold
0 added to, 0 trimmed
What Aquamarine did in Q2 2026
Aquamarine opened no new positions, sold none outright and changed none by half or more. Berkshire Hathaway is still the largest holding, at 33.9% of the portfolio.
Top 7 holdings
Values as reported in the 13F, not today’s prices| # | Company | Share of portfolio | Reported value | Change vs Q1 2026 | Held since |
|---|---|---|---|---|---|
| 1 | Berkshire HathawayBRK-B | 33.9% | $48.8M | No change | Q3 2024 or earlier |
| 2 | Berkshire HathawayBRK-A | 15.6% | $22.5M | No change | Q3 2024 or earlier |
| 3 | American ExpressAXP | 15.3% | $22.0M | No change | Q3 2024 or earlier |
| 4 | MastercardMA | 14.3% | $20.5M | No change | Q3 2024 or earlier |
| 5 | MoodysMCO | 8.5% | $12.2M | No change | Q3 2024 or earlier |
| 6 | FerrariRACE | 7.7% | $11.1M | No change | Q3 2024 or earlier |
| 7 | Daily JournalDJCO | 4.8% | $6.9M | No change | Q3 2024 or earlier |
Every quarter’s holdings going back years, and what changed in each.Request early access to see the full portfolio →
Follow Aquamarine, quarter by quarter
Valuepeg members get the full portfolio and its history, every company’s owners among the managers they follow, screens and watchlists.
- All 7 positions and their quarter-by-quarter history
- On any company, see which of your managers own it and what they did
- Watchlists and screens over the companies they hold
Other value investors
- Atlantic Investment Management
- Baupost Group · Seth Klarman
- Berkshire Hathaway · Warren Buffett
- Brave Warrior Advisors
- Cantillon Capital Management
About this data
- What is a 13F?
- A quarterly report to the SEC in which an investment manager with over $100 million in US-listed stocks lists what it holds.
- How current is it?
- Managers file up to 45 days after each quarter ends, so the holdings may have changed since.
- Whose figures are these?
- The values are as the manager reported them in the filing, not today's prices. The SEC lets a manager keep some positions confidential for a time, and those are not in the filing.
- What does it leave out?
- Short positions, cash, bonds and most holdings outside US markets. Options are left out here too.